Above Brighton Marina. Grim place anyhows, who'd feel like diving on to Asda carpark. The wording struck me as too near to the point. But then again what do you put on such a sign? Something kindly, heartwarming, uplifting? Do you plant flowers? Nice colours? Say that it is Asda car park below? Get them to sponsor it, inc logo?
At school I spent weeks designing inflatable shark fins for a site specific art competition. Getting the perspective and proportions right was the main difficulty, I remember. Using an underwater mechanism the over large fins were to circle the beach below Beachy Head, visible from the cliff edge.
I didn't win the prize. Are there people who specialise in thinking up and then producing such warning signs?